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View Full Version : G75VW GTX660M and 4K, displayport version!?...



LeCarl
12-06-2014, 08:37 PM
Hi,

I really want to use 4K screen on my G75VW GTX660M 2GB...
I use my G75 to graphic/astronomic pixels resolving calculation... so as powerful portable workstation (full upgraded... at least, thermal dissipation power is so good that it can hold calculation full charge 4/8 core at 3.8Ghz! for hours!) :D

Don't talk to me about games and 4k... because this laptop had never see one 3D games! :rolleyes:

Currently, I use an good external full HD calibrated monitor.., but want to use an Asus PB287Q ultra HD monitor

I seen somewhere in 4K that the compatibility limitation is the videocard... cable, plug or monitor
and... worst to have 60Hz and full colours... (some computer has native 30hz but has a tweak to have 60hz...)
I checked on Nvidia website and say that GTX660M support 3080x2160, I guess it's ok... (I don't know about Hz and colours?)
''Maximum Digital Resolution : 3840 x 2160''
http://www.geforce.com/hardware/notebook-gpus/geforce-gtx-660m/specifications
amazing that the 670M is not supposed to be able of 4k... and also not PCIE 3.0?

I also read at notebookcheck:
''The improved feature set now includes support for up to 4 active displays. Furthermore, high resolution monitors of up to 3840x2160 pixels can now be connected using DisplayPort 1.2 or HDMI 1.4a if available.''
http://www.notebookcheck.net/NVIDIA-GeForce-GTX-660M.71859.0.html

SO! what is the displayport version on this computer? it is NOT written anywhere what version is?! mine has the thunderbolt logo? good or not? ( some say HDMI don't work so it's 1.3!?)
too much simple to write the version!... :confused:

I still think about the GTX660m specification, it supposed to work?

It's sad to buy the screen and have to return it...?
(tomorrow, I will try to plug in at dealer, but it were near Christmas/time... they probably don't have the cable and screen, they are still in FullHD era on computer on floor)

LeCarl
12-10-2014, 11:53 PM
So, VERY complicated, but I have some ''good'' result

The G75VW with GTX 660M have an HDMI 1.4 output 100% sure!
(and maybe it's 1.4a, because of lower resolution 3d support... but not tested)
I tested/buy on a Samsung 28 inch 4K 28D590 AND MUST INSTALL MONITOR DRIVERS TO HAVE HIGHER THAN FullHD RESOLUTION
I used the supplied hdmi cable

But...
The sad things: HDMI 1.4 output 4K at maximum 30 Hz and seem to have strange colour (lower colour bit?... it's an TN screen...?) I don't know and 4k video is painful for the system, probably because it don't support native codec for uncoding 4K... even youtube video are hard for system)
(and I tried 4k video from my note 3 phone)
Furthermore, I have issue in win7 and 150% DPI upscaling, wiget on desktop are messy/destroyed and the toolbar don't hide anymore?@! (at least 100%-125% work fine as usual)
(it's major desktop toolbar/windows problem... like corrupted video memory? but work without crash at all, no problem there... drivers maybe?)

Otherwise it's SOOOOO SHARP! 4k is really... jaw breaking! I tried on low on resources 3d stellarium software (seem to have 3d still working smooth at those resolution... despite of the good FPS, still 30Hz limited...)

For the displayport, I didn't tested it... it's an minidisplay port, and/or the adapter or cable are rare!!! or costly! (especially in my area! at least 1 week for shipping)

Then I took the screen back to seller, and bought an Acer B326hul QHD (1440) 32 inch display, at least I can run it at full 100%... (no dpi upscale anymore...) I want simplicity... but still need an mini displayport 1.2 cable...!

LeCarl
12-11-2014, 06:40 PM
bought an Acer B326hul QHD (1440) 32 inch display... but still need an mini displayport 1.2 cable...!

In fact, no... I'm surprised that it works fine with the HDMI/HDMI 2550x1440 60Hz (native) (with monitor drivers)

I used the monitor original HDMI cable and I tried my 5$ Chinese HDMI 1.4 10 feet nylon covered cable and works fine too!